Lock



Nov. 5, 1929. E. N. JACOB] 1,734,333

LOCK

Filed Nov 25, 1925 WITNESSES w. EW- WM Patented Nov. 5, 1929 UNITEDSTATES PATENT OFFICE EDWARD N. JACOBI, OF MILNVAUKEE, \VISCONSIN,ASSIGNOR T0 BRIGGS AND STRAT- TON CORPORATION, OF MILWAUKEE, WISCONSIN,A CORPORATION OF DELAWARE LOCK Application. filed November 25, 1925.Serial No. 71,350.

This invention has for its object to provide a. lock of the rotatingcylinder type and relates to the means for providing a drivingconnection between the lock cylinder and the square stem or shaft whichconnects the lock proper with the part to be operated thereby.

The connection between the stem and the lock cylinder permits of angulardisplacement of the stem as the lock and the latch or other partoperated thereby may be out of axial alignment and the purpose of thisinvention is to permit of such angular disposition of the stem withoutimpairing its driving con nection.

Another object of the invention is to simplify the construction and makeit inexpensive to manufacture.

With the above and other objects in view the invention consists in thelock as herein claimed and all equivalents.

Referring to the accompanying drawings, in which like characters ofreference indicate the same parts in different views,

Fig. 1 is a central sectional view of a lock constructed in accordancewith this invention;

Fig. 2 is a rear view thereof;

Fig. 3 is a rear end view of the lock cylinder with the stem shown insection, and

Fig. 4 is an end view of the square stem.

In these drawings, 10 indicates a lock case in which a lock cylinder 11is mounted to be turned by the key inserted therein for withdrawingtumbler slides 12 from the locking grooves of the case as usual.

Different from the usual practice, the lock cylinder 11 in thisconstruction is let in from the front of the lock case and is confinedin place by a thin sheet metal shell 13 bent over the face and frontflanges of the lock case and having an opening through which the reducedend of the lock cylinder projects, the shoulder formed by the reducedend of the lock cylinder engaging the metal shell to take the end thrustof the lock cylinder as the key is withdrawn therefrom.

At its rear end the lock cylinder 11 provided with a square socket 1 1to loosely re ceive the end of the square stem 15, but said end of thestem has darts 16 pressed in opposite corners thereof to form outwardlyextending wings and the recess or socket 14 has out causing the stem tobind.

The wings 16 of the square stem serve to keep the stem in place inconnection with the lock cylinder against removal, but, as the lock caseis preferably of die cast metal, it may be desirable to re-enforce it byproviding a hard metal. washer 18 at the end of the bore which receivesthe lock cylinder and seated on the intcgral shoulder formed by the endof the bore, the opening in such washer being of suflicient size topermit the square stem to pass through, butnot the oppositely spreadwings 16.

In order that there may not be a binding of the square stem against thewasher, the corners of the stem that are pressed to form the darts 16are notched as at 19, producing undcrcuts to receive the washer when thestem is swung in the plane of the wings 16.

The inner end of the lock cylinder 11 may be provided with a rabbet 20extending part way around and receiving a stop lug or projection 21formed in the bore of the lock case. The reduced end of the bore of thelock case beyond the shoulder confining the washer 18 is made somewhatflaring so as to accommodate swinging movements of the square stemincident to the operation of the lock when assembled with the stem at anangle to the axis of the lock cylinder.

In operation whatever angle is given to the square stem with respect tothe axis of the lock cylinder, the turning of the lock cylinder will becommunicated to the stem through the loosely fittin g driving engagementbetween the square socket and the end of the stem, the spread wings 16assisting in communicating this driving connection. the parts permits ofthe angular position of the stem though the driving connection ismaintained notwithstanding and the engagement of the wings with thewasher prevents the withdrawal of the stem from the lock cylinder whilethe sheet metal shell stretched as a skin or covering over the flangedend of the lock case takes the end thrust in the other direction andconfines the lock cylinder to its driving relation with the square stem.

The clearance of opposite extensions 17 to take the wings with Contraryto the usual practice, the lock cylinder 11 and the square stem 15 areentered through the front of the lock case 10, making it possible toprovide the bore with an internal shoulder integral with the lock caseto confine the enlarged end of the square stem. Such integral shoulderis incapable of working loose, being independent of screws and the likeand, associated with the integral head of the square stem, produces apermanent connection between the parts. The stem is entirely incapableof being withdrawn from the rear of the lock case and could only bewithdrawn from the front where it was entered by dislodging the metalshell 13 and removing the lock cylinder 11. In other words the entirelock structure would have to be destroyed before the stem would bedisconnected.

Because of this permanent connection between the stem and the lock casenot depend ing upon removable plates held in place by screws, the wingedend of the stem is herein referred to as confined in the lock case andthe word confined is used with this meaning.

lVhat I claim as new and desire to secure by Letters Patent is:

1. A look comprising a lock case having a shouldered bore, a bearingwasher therein seated on the shoulder, a lock cylinder mounted in thelock case, a square driving stem passing through the bearing washer andhaving oppositely extending wings bearing on the bearing washer andfitting in a recess in the end of the lock cylinder to form a drivingconnection between the stem and the lock cylinder that will permit ofangulardisplacement of the lock stem.

2. A look comprising a lock case having a shouldered bore, a bearingwasher therein seated on the shoulder, a lock cylinder mounted in thelock case, a square connecting stem passing through the washer andhaving oppositely extending wings formed on its end bearing on thebearing washer and loosely fitting in a recess in the end of the lockcylinder, there being notches formed in the stem adjacent the wings toreceive the edges of the washer opening and permit the stem to assume anangular relation with respect to the axis of the lock cylinder.

3. A lock comprising a lock case having a bore opening to its flangedfront end, a lock cylinder fitting within the bore, a sheet metal shellextendingoter the end of the lock case and around the flange thereof andconfining the lock cylinder within the lock case, a washer seated in theend of the bore of the lock case, a square driving stem passing throughthe opening of the washer and provided with oppositely extending wingson its end to bear against the washer, there being a driving recess inthe end of the lock cylinder loosely receiving and "forming a drivingfit with the winged end of the driving stem permitting ofangulandisplacement of the driving stem.

AL. A look comprising a lock case having a bore opening to its flangedfront end, a lock cylinder fitting within the bore, a sheet metal shellextending over the end of the lock case and around the flange thereofand confining the lock cylinder within the lock case, a washer seated inthe end of the bore of the lock case, a square driving stem having awinged end fitting in a corresponding recess in the end of the lockcylinder, there being a rabbet around a portion of the end of the lockcylinder, and a stop lug within the lock case bore to determine thepositions of the lockcylinder by engagement with the ends of saidrabbet.

In a look, a die cast lock case having a bore extending from its frontflanged end, a lock cylinder fitting in the lock case, a thin sheetmetal shell surrounding the flanged front end of the lock case andholding the lock cylinder in place, a bearing washer seated in thebottom of the bore, a square driving stem passing through the bearingwasher and having darts formed on opposite edges to produce spreadingwings loosely received in a recess in the end of the lock cylinder,there being notches formed in the edges of the square stem adjacent thedarts for permitting angular displacement of the stem, and a stop lugformed in the bore of the lock case and fitting in a rabbet in the endof the lock cylinder for determining the positions of the lock cylinder.

In testimony whereof I aifix my signature.

EDWARD N. JACOBI.

